Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory
Equinor has plans to develop a whale monitoring station using acoustic animal destiny estimation at their cabled ocean observatory, the LoVe Observatory, in Lofoten-Vesterålen basin. The fauna of this area is of remarkable importance to the Norwegian economy due to its unique fishing banks and its n...
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Language: | English |
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The University of Bergen
2018
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Online Access: | https://hdl.handle.net/1956/18847 |
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ftunivbergen:oai:bora.uib.no:1956/18847 2023-05-15T16:13:18+02:00 Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory Øygard, Sigrid Husebø 2018-12-17T23:00:03Z application/pdf https://hdl.handle.net/1956/18847 eng eng The University of Bergen https://hdl.handle.net/1956/18847 Copyright the Author. All rights reserved Akustiske signaler Finnhvaler Geoakustikk https://data.ub.uio.no/realfagstermer/c008315 https://data.ub.uio.no/realfagstermer/c002549 https://data.ub.uio.no/realfagstermer/c008554 752199 Master thesis 2018 ftunivbergen 2023-03-14T17:40:05Z Equinor has plans to develop a whale monitoring station using acoustic animal destiny estimation at their cabled ocean observatory, the LoVe Observatory, in Lofoten-Vesterålen basin. The fauna of this area is of remarkable importance to the Norwegian economy due to its unique fishing banks and its newly discovered petroleum reserves. This makes it important to monitor the Fin whale population in the area, especially if human interference in the region is to be increased due to new petroleum related interventions. Moreover, the observatory will hopefully bring about new knowledge of the habitat and migratory routes of the Fin whale, which are currently poorly understood. In order to implement an animal density estimation algorithm at the LoVe Observatory it is necessary to know how the transmission loss experienced by sounds reaching the observatory varies as a function of position around the receiver. This study has developed a set of model tools fit to simulate the transmission loss at any position in the Lofoten-Vesterålen basin, by using environmental data available at various databases as input parameters to the parabolic equation model Range-dependent Acoustic Model (RAM). The study has utilized these tools to produce simulations of the transmission loss at a number of example transects, in order to present some conclusions about how the transmission loss is affected by the environmental parameters bathymetry, sound speed profiles and sedimentary geoacoustic properties. Furthermore, the simulations have been repeated for each of the four seasons, to look at how the transmission loss varies across the year. Generally, the study will show that the variation of transmission loss with position is complex and that the inclusion of environmental parameters in the simulations is necessary. It will be shown that the observatory is capable of detecting Fin whales at 190 km in low noise conditions, but that this range is limited by the angular direction of the propagation path and by increases in the noise level. ... Master Thesis Fin whale Lofoten Vesterålen University of Bergen: Bergen Open Research Archive (BORA-UiB) Lofoten Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Akustiske signaler Finnhvaler Geoakustikk https://data.ub.uio.no/realfagstermer/c008315 https://data.ub.uio.no/realfagstermer/c002549 https://data.ub.uio.no/realfagstermer/c008554 752199 |
spellingShingle |
Akustiske signaler Finnhvaler Geoakustikk https://data.ub.uio.no/realfagstermer/c008315 https://data.ub.uio.no/realfagstermer/c002549 https://data.ub.uio.no/realfagstermer/c008554 752199 Øygard, Sigrid Husebø Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory |
topic_facet |
Akustiske signaler Finnhvaler Geoakustikk https://data.ub.uio.no/realfagstermer/c008315 https://data.ub.uio.no/realfagstermer/c002549 https://data.ub.uio.no/realfagstermer/c008554 752199 |
description |
Equinor has plans to develop a whale monitoring station using acoustic animal destiny estimation at their cabled ocean observatory, the LoVe Observatory, in Lofoten-Vesterålen basin. The fauna of this area is of remarkable importance to the Norwegian economy due to its unique fishing banks and its newly discovered petroleum reserves. This makes it important to monitor the Fin whale population in the area, especially if human interference in the region is to be increased due to new petroleum related interventions. Moreover, the observatory will hopefully bring about new knowledge of the habitat and migratory routes of the Fin whale, which are currently poorly understood. In order to implement an animal density estimation algorithm at the LoVe Observatory it is necessary to know how the transmission loss experienced by sounds reaching the observatory varies as a function of position around the receiver. This study has developed a set of model tools fit to simulate the transmission loss at any position in the Lofoten-Vesterålen basin, by using environmental data available at various databases as input parameters to the parabolic equation model Range-dependent Acoustic Model (RAM). The study has utilized these tools to produce simulations of the transmission loss at a number of example transects, in order to present some conclusions about how the transmission loss is affected by the environmental parameters bathymetry, sound speed profiles and sedimentary geoacoustic properties. Furthermore, the simulations have been repeated for each of the four seasons, to look at how the transmission loss varies across the year. Generally, the study will show that the variation of transmission loss with position is complex and that the inclusion of environmental parameters in the simulations is necessary. It will be shown that the observatory is capable of detecting Fin whales at 190 km in low noise conditions, but that this range is limited by the angular direction of the propagation path and by increases in the noise level. ... |
format |
Master Thesis |
author |
Øygard, Sigrid Husebø |
author_facet |
Øygard, Sigrid Husebø |
author_sort |
Øygard, Sigrid Husebø |
title |
Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory |
title_short |
Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory |
title_full |
Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory |
title_fullStr |
Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory |
title_full_unstemmed |
Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory |
title_sort |
simulations of acoustic transmission loss of fin whale calls reaching the love ocean observatory |
publisher |
The University of Bergen |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18847 |
long_lat |
ENVELOPE(14.939,14.939,68.754,68.754) |
geographic |
Lofoten Vesterålen |
geographic_facet |
Lofoten Vesterålen |
genre |
Fin whale Lofoten Vesterålen |
genre_facet |
Fin whale Lofoten Vesterålen |
op_relation |
https://hdl.handle.net/1956/18847 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1765998964908228608 |